• Model: 2106B2310
• Brand: Honeywell
• Series: Sensepoint HT
• Core Function: Detects combustible gases at high temperature
• Type: High-temperature flammable gas sensor
• Key Specs: M20 thread; 0-20% LEL or 0-100% LEL; -55°C to +150°C
• Output: mV bridge
• Certification: ATEX

Honeywell documentation identifies 2106B2310 as the Sensepoint HT Flammable Sensor, M20 version, designed for high-temperature combustible-gas detection.

Product Introduction

Honeywell 2106B2310 is a Sensepoint HT high-temperature flammable gas sensor with an M20 connection. It is intended for combustible-gas detection where operating temperature can reach +150°C, and the sensor is specified for ATEX applications. The sensing element provides an mV bridge output for connection to a compatible control system.

For demanding installations, temperature capability is the key point. The published range is -55°C to +150°C, with selectable measurement range depending on the control card: 0-20% LEL or 0-100% LEL. Response is also fast, with published T60 below 6 seconds and T90 below 10 seconds.

Key Technical Specifications

The Honeywell quick guide gives 90-110 kPa for operating pressure, while one third-party listing reports 75-110 kPa. For procurement and engineering approval, the Honeywell published value should take priority.

Honeywell’s product documentation also identifies the sensor as a high-temperature LEL version and separates it from the standard Sensepoint LEL versions.

Honeywell 2106B2310

Installation & Configuration Guide

Stage 1 — Pre-Installation

Estimated time: 10 minutes

⚠️ Treat the installation as hazardous-area work. Follow the site permit system, gas-free requirements, isolation procedure, and the applicable ATEX installation rules.

Before touching the sensor:

1. Confirm the existing detector model and thread type.
2. Verify that the replacement is 2106B2310, M20.
3. Confirm the compatible junction box and control system.
4. Isolate the detector circuit according to the site procedure.
5. Allow the equipment to reach a safe temperature before handling it.
6. Photograph the existing wiring and terminal arrangement.
7. Record the existing control-card range and calibration settings.

The Sensepoint HT high-temperature version is intended to be installed with a suitable approved junction box. Honeywell lists 2052D0001 as a high-temperature ATEX junction-box accessory.

Stage 2 — Remove the Existing Sensor

Estimated time: 5-10 minutes

1. Verify electrical and process isolation.
2. Label the sensor wiring before removal.
3. Disconnect the conductors from the junction box.
4. Unscrew the old sensor from the M20 connection.
5. Inspect the threads, junction box, sealing arrangement, and cable entry.
6. Check for corrosion, contamination, or damaged wiring.

Do not force a seized hazardous-area connection. Mechanical damage at the thread or enclosure can create a much larger installation problem.

Stage 3 — Install 2106B2310

Estimated time: 10 minutes

1. Check the new sensor body and connector for visible damage.
2. Confirm the M20 version.
3. Install the sensor into the approved junction box arrangement.
4. Reconnect the wiring exactly as documented during removal.
5. Confirm polarity and bridge connections against the applicable Honeywell wiring diagram.
6. Check that the mechanical connection is secure.
7. Install the required high-temperature protection accessories where the application requires them.

Honeywell specifies the 2106B2310 as the M20 high-temperature Sensepoint HT version; M25 and 3/4 NPT variants use different part numbers.

Stage 4 — Power-Up, Calibration and Functional Test

Estimated time: 10-20 minutes, excluding calibration stabilization

1. Restore power according to the site procedure.
2. Allow the sensor to warm up.
3. Honeywell documentation specifies a warm-up time of less than 10 minutes.
4. Check the control-system input for a normal bridge signal.
5. Verify that the selected measurement range matches the control-card configuration.
6. Perform zero and span calibration using the approved calibration gas and site procedure.
7. Confirm the alarm threshold and displayed concentration.
8. Record the replacement date, sensor serial/identification information, calibration result, and technician.

⚠️ Do not assume that the replacement sensor is correctly calibrated simply because the electrical signal is present. Gas detection equipment must be checked against the applicable calibration procedure before being returned to service.

Common Application Risks

1. Range mismatch

The sensor can be used with 0-20% LEL or 0-100% LEL, depending on the control-card arrangement. A wrong range selection can produce misleading readings even when the sensor itself is functioning normally.

2. Wrong thread variant

Honeywell uses different part numbers for M20, M25 and 3/4 NPT versions:

• 2106B2310: M20
• 2106B2311: M25
• 2106B2312: 3/4 NPT

Do not substitute these based only on visual appearance.

3. Junction-box mismatch

The high-temperature sensor requires the correct hazardous-area installation arrangement. Honeywell specifically lists 2052D0001 as a high-temperature ATEX junction box.

4. Calibration skipped after replacement

A working electrical output does not prove correct gas measurement. Zero and span verification should be completed before the detector is placed back into operational service.

Quality Inspection for 2106B2310

For spare-parts inventory, the incoming inspection should include:

1. Part-number verification against 2106B2310.
2. Visual inspection for corrosion, impact marks, or damaged threads.
3. Check the M20 mechanical interface.
4. Verify labeling and certification markings.
5. Check packaging and included accessories where applicable.
6. Record serial or batch information.
7. Where a suitable test setup is available, perform electrical and functional checks using the approved Honeywell procedure.
8. Keep calibration and test records with the inventory lot.

For compliance-sensitive applications, retain the product identification and certification information with the shipment documentation.

FAQ

1. What exactly is Honeywell 2106B2310?

It is a Sensepoint HT Flammable Sensor, ATEX-certified M20 version, intended for combustible-gas detection in high-temperature environments.

2. Can 2106B2310 operate at +150°C?

Yes. Honeywell documentation specifies an operating temperature range up to +150°C for the high-temperature version.

3. Is 2106B2310 the same as 2106B2311?

No. Both belong to the same Sensepoint HT high-temperature family, but 2106B2310 is M20, while 2106B2311 is M25.

4. What measurement range does it support?

The published specification is 0-20% LEL or 0-100% LEL, depending on the control-card configuration. The control system must be configured for the correct range.

5. What signal does the sensor output?

The Sensepoint HT flammable sensor uses an mV bridge output. Honeywell documentation specifies a bridge voltage range of 2.9-3.5 V at 200 mA and power consumption of approximately 700 mW.

6. Can I replace it directly without calibration?

Not recommended. Mechanical replacement may be straightforward, but the detector should still undergo the applicable zero, span, and functional checks before being returned to service.

7. What accessories may be required?

For high-temperature installations, Honeywell lists accessories including the 2052D0001 high-temperature ATEX junction box and 00780-A-0076 high-temperature weather protection. The exact accessory combination depends on the installation.

Source note: Product identification and core specifications above are based primarily on Honeywell documentation; third-party sources were used only to supplement response-time and commercial listing details.